import type { NotificationDeliveryResult, NotificationGateway, NotificationGatewayRegistry } from '@core/notifications/application/ports/NotificationGateway';
import type { Notification } from '@core/notifications/domain/entities/Notification';
import type { NotificationChannel } from '@core/notifications/domain/types/NotificationTypes';

export class InMemoryNotificationGatewayRegistry implements NotificationGatewayRegistry {
  private gateways: Map<NotificationChannel, NotificationGateway> = new Map();

  register(gateway: NotificationGateway): void {
    this.gateways.set(gateway.getChannel(), gateway);
  }

  getGateway(channel: NotificationChannel): NotificationGateway | null {
    return this.gateways.get(channel) || null;
  }

  getAllGateways(): NotificationGateway[] {
    return Array.from(this.gateways.values());
  }

  async send(notification: Notification): Promise<NotificationDeliveryResult> {
    const gateway = this.gateways.get(notification.channel);
    
    if (!gateway) {
      return {
        success: false,
        channel: notification.channel,
        error: `No gateway registered for channel ${notification.channel}`,
        attemptedAt: new Date(),
      };
    }

    if (!gateway.isConfigured()) {
      return {
        success: false,
        channel: notification.channel,
        error: `Gateway for ${notification.channel} is not configured`,
        attemptedAt: new Date(),
      };
    }

    try {
      return await gateway.send(notification);
    } catch (error) {
      return {
        success: false,
        channel: notification.channel,
        error: error instanceof Error ? error.message : String(error),
        attemptedAt: new Date(),
      };
    }
  }
}